Cup holder



FIG. 1 is a front isometric view of a cup holder showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view, the opposite side elevation view being a mirror image thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a cup holder, as shown and described. 